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openshift-docs/modules/virt-hot-plugging-cpu.adoc
Sasha Beskin 1d10a8d69b CNV-62383
2025-08-21 14:16:45 +00:00

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// Module included in the following assemblies:
//
// * virt/virtual_machines/virt-edit-vms.adoc
:_mod-docs-content-type: PROCEDURE
[id="virt-hot-plugging-cpu_{context}"]
= Hot plugging CPUs on a virtual machine
You can increase or decrease the number of CPU sockets allocated to a virtual machine (VM) without having to restart the VM by using the {product-title} web console.
.Procedure
. Navigate to *Virtualization* -> *VirtualMachines*.
. Select the required VM to open the *VirtualMachine details* page.
. On the *Configuration* tab, click *Edit CPU|Memory*.
. Select the *vCPU* radio button.
. Enter the desired number of vCPU sockets and click *Save*.
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[NOTE]
====
You can hot plug up to three times the default initial number of vCPU sockets of the VM. Exceeding this limit requires a restart.
====
+
If the VM is migratable, a live migration is triggered. If not, or if the changes cannot be live-updated, a `RestartRequired` condition is added to the VM.